Tinsmith&#39;s furnace.



G. J. JOHNSON. I

I TINSMITHS FURNACE. APPLICATION FILED JULY 14, 1913.

1,088,230. Patented Feb. 24, 1914.

Ink/671107 C'fiarles 1 J07: nsdrl UNITED STATES PATENT orrron.

CHARLES JOHNSON, or CEDAR Raisins, IOWA; ASSIGNOB. To THE JOHNSON ens APPLIANCE 00., OF CEDAR RAPIDS, IPWA};

TINSMITHS FURNACE.

Specification of Letters Patent, Pat'nted Fe b, 24, 1914;

Application filed July 14, 1913. Serial No. 779,038.

To all whom it may concern:

Be 1t known that I, CHARLES J. JOHNSON,

a citizen ofthe United States,residing attempering and forging of tools, and other like operations requiring but a limited heat. The Invention therefore consists in the structure of parts and 1n their comblnatlon for the purpose specified substantially as hereinafter set forth and claimed.

In the accompanying drawings which form apart of this specification, Figure 1 represents the inventionin plan, the hood being thrown back; Fig. 2 shows it longitudinal, vertical, medial section of the furnace in operation; and Fig. 3 is a front elevation of the furnace with the hood removed.

In the drawing, A. designates the main casting or base of the furnace provided with legs a, a well I) and lugs c, to which is pivoted a hood B. Through a hole in the front of the well slightly projects the nozzle of the Bunsen burner C, which has a branch cl, provided with a pilot tube 6, and mounted upoir't'he supply pipe D. A stop-cock E, provided with a lever F, regulates the flow of gas in the burner. A pinion h meshes with a small gear i, whieh'is a .partof the needle-valve regulator, but forms no essential feature of this invention. The burner is inclined so that the flame is projected toward the back and upper part of the well where the point of a copper is located when heating. It is desirable, however, to protect the tinned point of. the copper against Copies 6! this potent may be obtained for five cents each, by addressing the Commissioner 0! with an uprightrib or flange 9 to serve as a stop or limit for said points. This ledge is far enough from the front edge of the rest to permit the tinned point to project beyond the path of the flame. A non-conducting lining H of asbestos is preferably provided.

The curvature of the hood. is such that it' serves to deflect the flame back upon the copper thereby heating the whole copper uniformly without having to turn the copper.

When it is desired to heat something \too large to enter the mufiie the hood is turned back and such object set upon the base over the Well and burner. I

The burner is preferably supported between the front'legs of the furnace upon trunnions I and the supply pipe by a hanger J at the rear end of the furnace. To aid in securing complete combustion during, low

pressure of gas, air holes f may be provided in the front wall of the well.

The invention claimed is:

1. In a tinsmiths furnace the combinatioh of a base having a tool support and a well\to the rear of said support and below it, a burner attachedto said base and projecting diagonally upward and rearward into the well, and a hood hinged at. the rear of the well and forwardly curved in a manner such as to deflect the heat forward and downward toward the well for the purpose set forth.

2. In a tinsmiths furnace the combination of a base having a tool support and a well at its rear and below the level of the toolsupport. a burner mounted at the front' of the furnace and projecting obliquely upward into said well to direct the flame to the rear of the furnace, a forwardly curved hood hinged to the base back of the well and forwardly curved in a manner such as to deflect the heat forward and downward toward the well, and a rest consisting of an angleplate having an upwardly extendinglimiting rib and mounted at the back end of the well for the purpose specified.

In testimony whereof-l have aflixed my signature in presence of two witnesses.

CHARLES J. JOHNSON. Witnesses:

EDNA KAOHELHOFFER, JAMES W. Goon.

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